The following Mac models support resolutions and refresh rates of up to 1080p at 60Hz, and 3840 x 2160 at 30Hz, over HDMI 1.4b when using the Apple USB-C Digital AV Multiport Adapter with macOS Sierra 10.12 or later:

iMac (2017 and later)

iMac Pro (2017)

MacBook (2015 and later)

MacBook Air (Retina, 13-inch, 2018)

MacBook Pro (2016 and later)

The computers listed above also support 60Hz refresh rate over HDMI when used with a supported HDMI 2.0 display, HDMI Premium Certified cable, and a compatible third-party USB-C to HDMI 2.0 adapter.

If the HDMI display that's connected to your Mac starts up to the Apple logo but then goes dark, you might need to update your HDMI cable. To ensure compatibility, and to achieve 4K resolution, Apple recommends a cable that supports HDMI 2.0 or later, such as the Belkin Ultra High Speed 4K HDMI Cable.

Single-stream transport (SST) displays

Most SST 4K displays are supported at 30Hz.

With OS X Yosemite 10.10.3 and later, most SST 4K (3840 x 2160) displays are supported at 60Hz on these Mac computers:

iMac (27-inch, Late 2014) and later

iMac Pro (2017)

Mac mini (2018)

Mac Pro (Late 2013)

MacBook Air (Early 2015) and later

MacBook Pro (Retina, 13-inch, Early 2015) and later

MacBook Pro (Retina, 15-inch, Mid 2014) and later

With OS X Yosemite 10.10.3 and later, most SST 4K (4096 x 2160) displays are supported at 60Hz on these Mac computers:

If you use a 60Hz MST display with the MacBook Pro (Retina, 15-inch, Mid 2015) with AMD Radeon R9 M370X graphics card or iMac (Retina 5K, 27-inch, Late 2014), only one additional Thunderbolt display is supported. Learn more about Thunderbolt ports and displays.

Adjust your display

Choose Apple () menu > System Preferences, then click Displays to adjust or scale the resolution on your display. This can make text and objects appear larger or give you more space on your screen. If your Mac doesn’t recognize a display you’ve just connected, hold down the Option key to make the Detect Displays button appear, then click that button.

Learn more

4K displays and Ultra HD TVs using Windows 7, 8, and 8.1 with Boot Camp use the same rules as macOS. If you upgrade from Windows 8 to 8.1, you should repair Boot Camp drivers.

To get the best graphics performance from your 4K display, connect the display or its adapter directly to your Mac, instead of connecting through another peripheral or device.

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